Code No. C1381: G sensor (output error, seizure)
Code No. C1382: G sensor stuck on
| caution |
- If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table
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- Whenever ECU is replaced, ensure that the CAN bus lines are normal.
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OPERATION
The G sensor is incorporated in the hydraulic unit, and output the longitudinal acceleration of the vehicles.
DIAGNOSIS CODE SET CONDITIONS
ABS-ECU monitors the G sensor output signal, and when an abnormality is present in the signal from the G sensor, the ECU determines that the trouble occurs and sets the diagnosis code.
PROBABLE CAUSES
Current trouble
- Malfunction of the hydraulic unit assembly (integrated with ABS-ECU)
- Malfunction of the hydraulic unit assembly (integrated with ABS-ECU) installation
- External noise interference
Past trouble
- For diagnosis procedures, refer to How to treat past trouble (GROUP 00 - How to Use Troubleshooting/Inspection Service Points).
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When the vehicle is driven under special conditions, such as driving on a rough road, this diagnosis code will be set.
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STEP 1. M.U.T.-III CAN bus diagnosis
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Use M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 3.
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 Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnosis Table ). On completion, go to Step 2.
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STEP 2. Diagnosis code recheck after resetting CAN bus lines
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(1)Turn the ignition switch to the "ON" position.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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(4)Turn the ignition switch to the "ON" position.
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(6)Drive the vehicle at the speed exceeds 10 km/h.
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(7)Check if the diagnosis code is set.
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(8)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. C1381 or C1382 set?
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Go to Step 3.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions).
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STEP 3. M.U.T.-III data list
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Check the following service data.
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- Item No. 07: Longitudinal G sensor (Raw value)
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Q.
Is the check result normal?
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Go to Step 4.
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Replace the hydraulic unit assembly (integrated with ABS-ECU). Then go to Step 5.
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STEP 4. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set.
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(1)Turn the ignition switch to the "ON" position.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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(4)Turn the ignition switch to the "ON" position.
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(6)Drive the vehicle at the speed exceeds 10 km/h.
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(7)Check if the diagnosis code is set.
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(8)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. C1381 or C1382 set?
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Replace the hydraulic unit assembly (integrated with ABS-ECU). Then go to Step 5.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions).
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STEP 5. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set.
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(1)Turn the ignition switch to the "ON" position.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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(4)Turn the ignition switch to the "ON" position.
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(6)Drive the vehicle at the speed exceeds 10 km/h.
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(7)Check if the diagnosis code is set.
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(8)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. C1381 or C1382 set?
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Return to Step 1.
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The procedure is complete.
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